The UN hasn't explicitly called it genocide, but if you assume China's motivation is to reduce their population, it seems hard to argue its actions wouldn't qualify. Widespread arbitrary imprisonment and certainly forced sterilization would meet at least condition 4 of their requirement. The Genocide Convention's definition is below, emphasis mine:
In the present Convention, genocide means any of the following acts committed with intent to destroy, in whole or in part, a national, ethnical, racial or religious group, as such:
- Killing members of the group;
- Causing serious bodily or mental harm to members of the group;
- Deliberately inflicting on the group conditions of life calculated to bring about its physical destruction in whole or in part;
4. Imposing measures intended to prevent births within the group;
- Forcibly transferring children of the group to another group.
You could argue they don't actually intend to reduce the Uyghur population, but it's hard to accept that a surge in the Xinjiang region's sterilization rate and the birth rate being cut in half over the course of three years are just anti-terrorism measures.
As others have said, I would get it written down somewhere asap. In the future, you could ask to have an email sent to you to confirm the date, time, location, interviewers, and any other details like who to contact with questions/rescheduling. Plus they might also share hints like dress code, projected length, and expected types of questions that can help you prepare but might look bad if you explicitly asked for them.
If I was a recruiter, I wouldn't think less of you for asking for confirmation. Rather, it makes you seem professional and prudent to want to avoid mix-ups like what you just experienced, that you have a legitimate interest in the position, and that you value your interviewers' time as well as your own. Even if you have a sharp memory, this sort of thing can easily happen just from someone mishearing or misspeaking on the phone.
Good luck with the job hunt. You get better at it with experience, but even then, it's mostly a numbers game. Don't let a rejection get you down, every new application is a fresh start with more experience.